Sure, no problem!
I do not personally own the ZS5 (yet). With that said, it has had nothing but good reviews, and has been touted as the best sounding IEM KZ has produced to date. I love the KZ ZS3 and ZST, and the sound of the ZS5 has been compared to be right in between the 2. So I'm sure I would love the ZS5.
Again, I mention that Vidal scored the KZ ZS5 with an almost perfect score - higher than anything he has ever tested to date. And he has tested almost 130 different IEMs from many different manufacturers. He is very honest and knowledgeable, and his reviews are trustworthy.
I don't believe that he has ever heard the K3 Pro though, so you will have to find another member that can make a direct comparison between the ZS5 and the K3 Pro. I
THINK some of the members that have heard both are
@1clearhead,
@SpiderNhan,
@loomisjohnson,
@B9Scrambler, and a few others. I could be wrong on a few members though, because I am going by memory.
The best thing to do is to ask on the Magaosi K3 thread, to see who owns both and can compare the K3 Pro and ZS5. The K3 thread is here:
https://www.head-fi.org/f/threads/magaosi-k3-pro-impressions-and-discussions-thread.839011/
I'm sorry, I do not have any experience with Taobao. Up until recently, US customers couldn't even purchase products from Taobao.
Be aware that there are counterfeit Magaosi K3 Pro being produced. It is strongly recommended that you buy from authorized Magaosi dealers or better yet directly from Magaosi themselves. The 1 year warranty is only honored from Magaosi. So if you buy from an unauthorized seller, there will be no warranty (and no guarantee that you will even get a genuine product).
Here is the link with information on purchasing directly from Magaosi. They DO have a Taobao store. So if it was me, I would buy it from there:
https://www.head-fi.org/f/threads/c...phones-and-iems.820747/page-587#post-13474912
Finally, you may want to wait until the Magaosi K3 HD is released. It is supposed to have better sound than the K3 Pro, and some Head Fi members have already heard the K3 HD and agree that it is superior to the K3 Pro.